Dystonia is a neurological movement disorder in which sustained muscle contractions cause twisting and repetitive movements or abnormal postures. This disease is very heterogeneous and can have many causes. Current treatments (drugs, pallidal stimulation) improve primary generalized dystonias; however they are ineffective for focal dystonias following brain damage.

Cortex stimulation is a present and effective technique used in the treatment of chronic pain and could represent an interesting strategy to treat focal dystonias. This is the aim of the present study.

Further study details as provided by University Hospital, Clermont-Ferrand:

Primary Outcome Measures:

Evaluation of dystonia by using the validated "Burke Fahn and Marsden (1985)" dystonia rating scale [ Time Frame: before the chirurgical intervention and 2, 5, 6, 9 and 13 months after ]

Secondary Outcome Measures:

Evaluation of spasticity (Ashworth), of akinesy (Tapping score), of pain (EVA test), of quality of life (SF 36 scale) and of undesirable events. [ Time Frame: before the chirurgical intervention and 2, 5, 6, 9 and 13 months after ]

Enrollment:

5

Study Start Date:

September 2007

Study Completion Date:

June 2011

Primary Completion Date:

June 2011 (Final data collection date for primary outcome measure)

Intervention Details:

Device: Implantation of neurostimulators and their auxiliary components

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Please refer to this study by its ClinicalTrials.gov identifier: NCT00505323